|Administrative area|Area km2|Area sq mi|Population|Administrative centre|
|---|---|---|---|---|
|Saint Helena|122|47|5,809|Jamestown|
|Ascension Island|91|35|1,532|Georgetown|
|Tristan da Cunha|184|71|388|Edinburgh of the Seven Seas|
|Tristan da Cunha|98|38|382|Edinburgh of the Seven Seas|
|Inaccessible Island|14|5|0|denstone hut|
|Nightingale Island|3.2|1|0|West Landing|
|Gough Island|68|26|6|Transvaal Bay|
|Total|397|153|7,729|Jamestown|

Question: how many administrative centre is there?
Answer: 6